"On National Defense in the Air", also known as "Winged National Defense", is the main work on air power. As a good strategist, Mitchell believes that aviation has promoted a revolution in combat methods; the air force is the decisive force in future wars; it is necessary to establish three major arms: destroyer aviation, bombing aviation, and assault aviation; because the air force can penetrate deep into the enemy's hinterland and destroy the enemy's power in a short time, once it gains air supremacy, there will be no more long-term wars that sacrifice millions of lives; an air defense system consisting of listening stations, interceptors, searchlights, and anti-aircraft artillery must be established to defend the homeland with the power of the air force.
